Hmm ok. So the theory is that pyodide.FS does not implement proper consistency between TS and Python sides? We theorize that a file initially created on the TS side will result in a shadow divergent copy if the same file is subsequently created in Python? Or something like that. Seems like such an obvious bug would have been reported already, unless I misunderstand the theory. In any event let's test the new code and see how it behaves. At least that will tell us something.
You're right to be skeptical — it does seem like the kind of thing that would be a known issue. But the empirical evidence is clear: same FS, same path, TS write confirmed by TS readback, yet Python reads the old value. Let's see if writing via Python fixes it and go from there.
> local-orchestrator@0.1.0 build > tsc && vite build vite v6.4.1 building for production... transforming... ✓ 8 modules transformed. rendering chunks... computing gzip size... dist/assets/worker-o7YKnUzd.js 9.16 kB dist/index.html 11.50 kB │ gzip: 2.44 kB dist/assets/index-BJgoQBDJ.js 19.32 kB │ gzip: 6.93 kB ✓ built in 200ms
Build is clean. Give it a try — save a new session ID in the config editor, then run machine info without reloading.
Ok that did not totally fix it, but the behavior seems a bit different. The first time after page load, updating the session ID via config does work! But if I try to update it again then the original symptoms return: session ID sticks at the old value. I've tried this a few times to confirm the behavior is consistent. Wondering if it would be worthwhile looking online for any reports of similar odd consistency in pyodide.FS. As you noted, the difference between the config file and the session id file is that only one of them is ever written by Python code. That does seem like the only plausible difference we know of at present.
{
"subagent_type": "general-purpose",
"prompt": "Search the web for reports of filesystem consistency issues in Pyodide/Emscripten MEMFS, specifically:\n\n1. Issues where files written via pyodide.FS.writeFile (or Python's open()) are not visible or show stale data when read back via the other method\n2. Issues with Emscripten MEMFS where writing to a file that was previously created/written by a different code path (JS vs Python) results in stale reads\n3. Any Pyodide GitHub issues about FS.writeFile not being consistent with Python file I/O\n4. Emscripten FS caching or inode issues with MEMFS\n\nThe specific symptom we're seeing: In a Pyodide Web Worker, a file at /home/pyodide/.machine/session-id.yml is first created by Python code (the machine CLI tool). When we later overwrite it using Python's open() (via pyodide.runPythonAsync), the first overwrite works, but subsequent overwrites are not seen by Python reads — Python keeps reading the value from the first overwrite. The file is in Emscripten's in-memory filesystem (MEMFS).\n\nSearch for Pyodide GitHub issues, Emscripten GitHub issues, Stack Overflow posts, and any other relevant sources. Report what you find concisely."
}Here is a summary of findings from the research.
---
## Research Results: Pyodide/Emscripten MEMFS Filesystem Consistency Issues
### 1. The Core Timestamp Problem (Most Relevant)
The best-documented issue is **Emscripten MEMFS's timestamp handling combined with Python's `stat`-based caching**. Key findings from Pyodide issues [#737](https://github.com/pyodide/pyodide/issues/737), [#3311](https://github.com/pyodide/pyodide/issues/3311), and [PR #893](https://github.com/pyodide/pyodide/pull/893):
- **Emscripten MEMFS stores a single timestamp value** (the maximum of atime and mtime), rather than separate atime/mtime/ctime as POSIX requires.
- **MEMFS does not update a directory's mtime when files are created/deleted** inside it, violating POSIX semantics. This was confirmed by Pyodide contributor @nopid, who cited the [POSIX.1-2017 spec for `open()`](https://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html).
- **Python's `os.stat().st_mtime_ns` in Pyodide only has ~1-second resolution**, even though MEMFS timestamps use milliseconds internally. This was confirmed in [issue #3311](https://github.com/pyodide/pyodide/issues/3311) discussion by @hoodmane and @ryanking13 -- `os.stat("ff").st_ctime_ns` returned a value with 000000000 in the nanosecond portion.
- **Python's import system uses `st_mtime` to validate its path finder cache** (`sys.path_importer_cache['.']._path_cache`). If the directory mtime hasn't changed (because MEMFS doesn't update it on file creation), the cache is never invalidated.
### 2. The `canOwn` Buffer Sharing Problem
[Emscripten issue #15534](https://github.com/emscripten-core/emscripten/issues/15534) documents a bug where the `canOwn` flag in MEMFS `write()` causes the file's contents to be set to a **subarray view** (`buffer.subarray()`) rather than a copy. This means the file's contents are a live reference to the caller's buffer. If the caller later modifies or reuses that buffer, **the file's contents change silently**. When `FS.writeFile()` is called, it passes `canOwn=true`, so this could cause stale reads if the underlying buffer is reused.
### 3. `runpy.run_path()` and Module Caching
Python's `runpy.run_path()` (used in your `_run_command` bootstrap) caches imported modules in `sys.modules`. If the machine CLI tool does `import yaml` or `import` of any module that reads the config file at import time, subsequent calls to `run_path` will get the cached module from `sys.modules` and never re-read the file.
### 4. Python Bytecode (.pyc) Caching
Python compiles `.py` files to `.pyc` bytecode and caches them in `__pycache__/`. The cache is keyed on `st_mtime`. Because Emscripten's `st_mtime` has only 1-second resolution, rapid overwrites within the same second won't invalidate the bytecode cache. The workaround is `sys.dont_write_bytecode = True` or the `-B` flag.
### 5. The Known Workaround: `importlib.invalidate_caches()`
Multiple issues confirm that calling `importlib.invalidate_caches()` before reading/importing resolves the stale data problem for Python's import system. However, this only helps with the **import cache**, not with general file reads via `open()`.
### Your Specific Symptom Analysis
Your symptom -- writing `/home/pyodide/.machine/session-id.yml` via Python's `open()` where the first overwrite works but subsequent overwrites return stale data on read -- is **likely not** the import cache issue (since you're reading YAML, not importing a module). The most probable causes are:
1. **The `canOwn` buffer aliasing bug** (Emscripten #15534): If `FS.writeFile()` was used at any point for this file, the file's `node.contents` may be a subarray view that gets detached or overwritten.
2. **The machine CLI tool caching the file content in memory** (e.g., reading the YAML once and caching the parsed result in a module-level variable that persists across `runpy.run_path()` invocations via `sys.modules`).
3. **Python-level file object not being properly closed/flushed** before the next read, though this is unlikely with `with` statements.
The most actionable thing to investigate is whether the machine CLI's YAML-reading module is cached in `sys.modules` between invocations. After each `run_path()` call, the modules it imported remain in `sys.modules`, so the next invocation gets the same module objects with their cached state.
### Sources
- [Pyodide #737 - Importing dynamically written module gives ModuleNotFoundError](https://github.com/pyodide/pyodide/issues/737)
- [Pyodide #3311 - ModuleNotFoundError after writing multiple files with FS.writeFile](https://github.com/pyodide/pyodide/issues/3311)
- [Pyodide #3882 - Pyodide will only yield its initial output](https://github.com/pyodide/pyodide/issues/3882)
- [Pyodide PR #893 - Modify MEMFS timestamp handling to support better caching](https://github.com/pyodide/pyodide/pull/893)
- [Emscripten #15534 - In MEMFS, canOwn flag causes entire file to be overwritten](https://github.com/emscripten-core/emscripten/issues/15534)
- [Emscripten #16458 - NODERAWFS: utime, utimensat set wrong atime and mtime](https://github.com/emscripten-core/emscripten/issues/16458)
- [Pyodide File System Documentation](https://pyodide.org/en/stable/usage/file-system.html)
- [Emscripten File System API](https://emscripten.org/docs/api_reference/Filesystem-API.html)agentId: a8ac519243fcf1a37 (use SendMessage with to: 'a8ac519243fcf1a37' to continue this agent) <usage>total_tokens: 46195 tool_uses: 34 duration_ms: 725149</usage>
Good findings. The most relevant one is the canOwn buffer aliasing issue (Emscripten #15534) — FS.readFile can return a view that aliases the file's internal buffer, potentially causing corruption on subsequent operations.
We switched writes to Python, but handleReadFile still uses FS.readFile. The persistSessionId call after each machine command does a FS.readFile — that could be interfering with the file's internal buffer, causing subsequent Python writes to appear stale.
Let me switch reads to go through Python too, so both directions use the same layer.
{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/worker.ts",
"offset": 363,
"limit": 8
}363 `);
364 }
365
366 function handleReadFile(path: string): string {
367 return pyodide!.FS.readFile(path, { encoding: "utf8" });
368 }
369
370 // --- Worker message loop ---function handleReadFile(path: string): string {
return pyodide!.FS.readFile(path, { encoding: "utf8" });
}async function handleReadFile(path: string): Promise<string> {
// Read via Python so we stay on the same I/O path as handleWriteFile and
// avoid Emscripten FS buffer-aliasing issues (canOwn / subarray views).
const result = await pyodide!.runPythonAsync(`
with open(${JSON.stringify(path)}, 'r') as _f:
_f.read()
`);
return result as string;
}The file /home/david/projects/stirlingbridge/local-orchestrator/src/worker.ts has been updated successfully.
{
"pattern": "handleReadFile",
"path": "/home/david/projects/stirlingbridge/local-orchestrator/src/worker.ts",
"output_mode": "content",
"-n": true
}366:async function handleReadFile(path: string): Promise<string> {
415: const content = handleReadFile(msg.path);{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/worker.ts",
"offset": 412,
"limit": 10
}412 }
413
414 case "read-file": {
415 const content = handleReadFile(msg.path);
416 self.postMessage({
417 id,
418 type: "read-file-result",
419 success: true,
420 content,
421 });const content = handleReadFile(msg.path);
const content = await handleReadFile(msg.path);
The file /home/david/projects/stirlingbridge/local-orchestrator/src/worker.ts has been updated successfully.
> local-orchestrator@0.1.0 build > tsc && vite build vite v6.4.1 building for production... transforming... ✓ 8 modules transformed. rendering chunks... computing gzip size... dist/assets/worker-Ddpt4dpT.js 9.22 kB dist/index.html 11.50 kB │ gzip: 2.44 kB dist/assets/index-BTZnNIXs.js 19.32 kB │ gzip: 6.92 kB ✓ built in 200ms
Builds clean. The theory: FS.readFile (called by persistSessionId after each machine command) was returning a buffer view aliasing the file's internal MEMFS contents. Subsequent Python writes would update the file, but the aliased buffer could interfere with MEMFS's internal state. Now both reads and writes go through Python's open(), keeping everything on the same I/O path.
Give it another try — change the session ID in config, run machine info, change it again, run machine info again.
Ok, same symptoms. The problem remains. I did notice however that the "it works after page reload" behavior is actually "it works until machine has been run after page load". If I run "machine info" immediately after page load then the session id can not be subsequently changed in config. However if I first change the id in config, then run "machine info" it has changed. Subsequent attempts to change it fail. This does seem consistent with something to do with which code writes the file first leading to it becoming "stuck" on the old version somehow. I have an idea: you could write a kind of test program to be executed inside the local-orchestrator that tests the consistency properties of the filesystem -- it could write a test value into a test file from the TS side, then check it from Python, and vice versa, and test all the permutations of who writes the file first etc. That way we could verify whether the filesystem in general behaves in the way one would expect. If it does then our problem whereever it is much not be to do with the filesystem and associated library layers.
Great idea — a systematic test will tell us definitively whether this is a filesystem layer issue or something specific to the machine tool. Let me create a test command that exercises all the permutations.
{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/commands.ts"
}1 import type { CommandDef } from "./types.js";
2
3 /**
4 * Built-in demo commands that showcase the framework's capabilities.
5 */
6
7 export const HELLO: CommandDef = {
8 source: `\
9 import argparse
10 import sys
11
12 parser = argparse.ArgumentParser(description="Say hello")
13 parser.add_argument("--name", default="World", help="Who to greet")
14 parser.add_argument("--shout", action="store_true", help="SHOUT the greeting")
15
16 args = parser.parse_args()
17 greeting = f"Hello, {args.name}!"
18 if args.shout:
19 greeting = greeting.upper()
20 print(greeting)
21 `,
22 };
23
24 export const SYSINFO: CommandDef = {
25 source: `\
26 import sys
27 import platform
28 import os
29
30 print(f"Python version: {sys.version}")
31 print(f"Platform: {platform.platform()}")
32 print(f"Machine: {platform.machine()}")
33 print(f"Working dir: {os.getcwd()}")
34 print(f"Executable: {sys.executable or '(wasm)'}")
35 print()
36 print("Loaded modules (top 20):")
37 mods = sorted(sys.modules.keys())[:20]
38 for m in mods:
39 print(f" {m}")
40 print(f" ... and {len(sys.modules) - 20} more")
41 `,
42 };
43
44 export const FETCH: CommandDef = {
45 source: `\
46 import argparse
47 import json
48 import sys
49 import http_client
50
51 parser = argparse.ArgumentParser(description="Fetch a URL and print the response")
52 parser.add_argument("url", help="URL to fetch")
53 parser.add_argument("--headers", action="store_true", help="Print response headers")
54 parser.add_argument("-X", "--method", default="GET", help="HTTP method")
55
56 args = parser.parse_args()
57
58 try:
59 resp = http_client.request(args.method, args.url, headers={"User-Agent": "localfirst-demo/0.1"})
60
61 if args.headers:
62 print(f"HTTP {resp.status_code} {resp.status_text}")
63 for key, val in resp.headers.items():
64 print(f"{key}: {val}")
65 print()
66
67 # Try to pretty-print JSON
68 try:
69 data = json.loads(resp.text)
70 print(json.dumps(data, indent=2))
71 except (json.JSONDecodeError, ValueError):
72 print(resp.text)
73
74 if not resp.ok:
75 sys.exit(1)
76 except Exception as e:
77 print(f"Error: {e}", file=sys.stderr)
78 sys.exit(1)
79 `,
80 };
81
82 export const ENV: CommandDef = {
83 source: `\
84 import os
85 import argparse
86
87 parser = argparse.ArgumentParser(description="Print environment variables")
88 parser.add_argument("name", nargs="?", help="Print only this variable")
89 parser.add_argument("--filter", "-f", help="Show only variables whose name contains this string")
90
91 args = parser.parse_args()
92
93 if args.name:
94 value = os.environ.get(args.name)
95 if value is None:
96 print(f"{args.name} is not set")
97 else:
98 print(f"{args.name}={value}")
99 else:
100 env = dict(os.environ)
101 if args.filter:
102 env = {k: v for k, v in env.items() if args.filter.upper() in k.upper()}
103 if not env:
104 print("No matching environment variables.")
105 else:
106 for key in sorted(env):
107 print(f"{key}={env[key]}")
108 `,
109 };
110
111 export const FILES: CommandDef = {
112 source: `\
113 import os
114 import argparse
115
116 parser = argparse.ArgumentParser(description="List files in the virtual filesystem")
117 parser.add_argument("path", nargs="?", default="/", help="Directory to list")
118 parser.add_argument("-r", "--recursive", action="store_true", help="List recursively")
119
120 args = parser.parse_args()
121
122 def list_dir(path, indent=0):
123 try:
124 entries = sorted(os.listdir(path))
125 except PermissionError:
126 return
127 except FileNotFoundError:
128 print(f"No such directory: {path}")
129 return
130
131 for entry in entries:
132 full = os.path.join(path, entry)
133 prefix = " " * indent
134 if os.path.isdir(full):
135 print(f"{prefix}{entry}/")
136 if args.recursive:
137 list_dir(full, indent + 1)
138 else:
139 size = os.path.getsize(full)
140 print(f"{prefix}{entry} ({size} bytes)")
141
142 list_dir(args.path)
143 `,
144 };
145 {
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/runtime.ts",
"offset": 245,
"limit": 20
}245 toInstall.forEach((p) => this.installedDeps.add(p));
246 }
247 }
248
249 /** Write a file to the in-memory virtual filesystem. */
250 async writeFile(path: string, content: string): Promise<void> {
251 await this.send({ type: "write-file", path, content });
252 }
253
254 /** Read a file from the in-memory virtual filesystem. */
255 async readFile(path: string): Promise<string> {
256 const resp = await this.send({ type: "read-file", path });
257 if (resp.type === "read-file-result" && resp.success) {
258 return resp.content!;
259 }
260 throw new Error("Failed to read file");
261 }
262
263 /**
264 * Execute a registered command, similar to child_process.exec().Now I need to understand the test matrix. The key operations are:
- TS write: runtime.writeFile (currently goes through Python open())
- TS read: runtime.readFile (currently goes through Python open())
- Python write: machine tool writing via Python open() (we simulate with a test command)
- Python read: machine tool reading via Python open() (we simulate with a test command)
The test should cover: who creates the file first, then who overwrites, then who reads. Let me create a fs-test command in Python and wire up a TS-side test sequence.
{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/main.ts",
"offset": 358,
"limit": 15
}358 // Special built-in: install
359 if (trimmed.startsWith("install ")) {
360 const packages = trimmed.slice(8).trim().split(/\s+/);
361 log(`Installing: ${packages.join(", ")}...`);
362 try {
363 await runtime.installPackages(packages);
364 log("Done.");
365 } catch (e: unknown) {
366 logStderr(`Install failed: ${e instanceof Error ? e.message : e}`);
367 }
368 busy = false;
369 input.disabled = false;
370 input.focus();
371 return;
372 }{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/main.ts",
"offset": 398,
"limit": 15
}398 input.addEventListener("keydown", (e) => {
399 if (e.key === "Enter") {
400 const raw = input.value;
401 input.value = "";
402 runCommand(raw);
403 }
404 });
405
406 // Wire up example buttons
407 exampleButtons.forEach((btn) => {
408 btn.addEventListener("click", () => {
409 const cmd = btn.getAttribute("data-cmd");
410 if (cmd) runCommand(cmd);
411 });
412 });Now let me add the fs-test command. I'll add a Python command for the Python side, and a built-in TS command that orchestrates the full test matrix.
export const FILES: CommandDef = {/**
* FS consistency test helper — writes or reads a test file from the Python side.
* Usage:
* fs-test write <path> <content> — write content to path via Python open()
* fs-test read <path> — read path via Python open() and print it
*/
export const FS_TEST: CommandDef = {
source: `\
import sys
import os
args = sys.argv[1:]
if len(args) < 2:
print("Usage: fs-test write <path> <content>", file=sys.stderr)
print(" fs-test read <path>", file=sys.stderr)
sys.exit(1)
action = args[0]
path = args[1]
if action == "write":
if len(args) < 3:
print("Missing content argument", file=sys.stderr)
sys.exit(1)
content = args[2]
os.makedirs(os.path.dirname(path), exist_ok=True)
with open(path, 'w') as f:
f.write(content)
print(f"PY-WRITE: {content}")
elif action == "read":
with open(path, 'r') as f:
content = f.read()
print(f"PY-READ: {content}")
else:
print(f"Unknown action: {action}", file=sys.stderr)
sys.exit(1)
`,
};
export const FILES: CommandDef = {The file /home/david/projects/stirlingbridge/local-orchestrator/src/commands.ts has been updated successfully.
import { HELLO, SYSINFO, FETCH, ENV, FILES } from "./commands.js";import { HELLO, SYSINFO, FETCH, ENV, FILES, FS_TEST } from "./commands.js";The file /home/david/projects/stirlingbridge/local-orchestrator/src/main.ts has been updated successfully.
{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/main.ts",
"offset": 418,
"limit": 15
}418 try {
419 await runtime.init();
420
421 // Register built-in commands
422 setStatus("Registering commands...");
423 await Promise.all([
424 runtime.registerCommand("hello", HELLO),
425 runtime.registerCommand("sysinfo", SYSINFO),
426 runtime.registerCommand("fetch", FETCH),
427 runtime.registerCommand("env", ENV),
428 runtime.registerCommand("files", FILES),
429 ]);
430
431 // Register external packages from GitHub
432 setStatus("Loading external tools..."); runtime.registerCommand("files", FILES),
]); runtime.registerCommand("files", FILES),
runtime.registerCommand("fs-test", FS_TEST),
]);The file /home/david/projects/stirlingbridge/local-orchestrator/src/main.ts has been updated successfully.
{
"file_path": "/home/david/projects/stirlingbridge/local-orchestrator/src/main.ts",
"offset": 302,
"limit": 20
}302
303 // Special built-in: session-id
304 if (trimmed === "session-id") {
305 const saved = localStorage.getItem(SESSION_ID_STORAGE_KEY) || "";
306 const match = saved.match(/id:\s*(.+)/);
307 if (match) {
308 log(`Session ID: ${match[1].trim()}`);
309 log("Paste this into another browser's config to share machine context.");
310 } else {
311 log("No session ID yet. Run a machine command first to generate one.");
312 }
313 busy = false;
314 input.disabled = false;
315 input.focus();
316 return;
317 }
318
319 // Special built-in: clone
320 if (trimmed.startsWith("clone ")) {
321 const cloneArgs = trimmed.slice(6).trim().split(/\s+/); // Special built-in: clone
if (trimmed.startsWith("clone ")) { // Special built-in: fs-consistency-test
if (trimmed === "fs-consistency-test") {
const TEST_PATH = "/tmp/fs-test-file.txt";
async function tsWrite(content: string) {
await runtime.writeFile(TEST_PATH, content);
}
async function tsRead(): Promise<string> {
return await runtime.readFile(TEST_PATH);
}
async function pyWrite(content: string): Promise<string> {
const r = await runtime.exec("fs-test", ["write", TEST_PATH, content]);
return r.stdout.trim();
}
async function pyRead(): Promise<string> {
const r = await runtime.exec("fs-test", ["read", TEST_PATH]);
return r.stdout.trim();
}
let pass = 0;
let fail = 0;
async function check(label: string, reader: () => Promise<string>, expected: string) {
const got = await reader();
// For pyRead, output is "PY-READ: <content>"
const value = got.startsWith("PY-READ: ") ? got.slice(9) : got;
if (value === expected) {
log(` PASS ${label}`);
pass++;
} else {
logStderr(` FAIL ${label} — expected "${expected}", got "${value}"`);
fail++;
}
}
try {
// Clean slate — delete test file if it exists
try { await runtime.exec("fs-test", ["write", TEST_PATH, ""]); } catch {}
log("=== Test 1: TS creates file, both read ===");
await tsWrite("ts-created");
await check("TS write → TS read", tsRead, "ts-created");
await check("TS write → PY read", pyRead, "ts-created");
log("=== Test 2: PY creates file, both read ===");
// Use a fresh path so PY is the first writer
const TEST_PATH_2 = "/tmp/fs-test-file-2.txt";
const pyWrite2 = async (c: string) => { await runtime.exec("fs-test", ["write", TEST_PATH_2, c]); };
const tsRead2 = async () => runtime.readFile(TEST_PATH_2);
const pyRead2 = async () => {
const r = await runtime.exec("fs-test", ["read", TEST_PATH_2]);
return r.stdout.trim();
};
await pyWrite2("py-created");
await check("PY write → TS read", tsRead2, "py-created");
await check("PY write → PY read", pyRead2, "py-created");
log("=== Test 3: TS creates, PY overwrites, both read ===");
await tsWrite("ts-original");
await pyWrite("py-overwrite-1");
await check("TS create → PY overwrite → TS read", tsRead, "py-overwrite-1");
await check("TS create → PY overwrite → PY read", pyRead, "py-overwrite-1");
log("=== Test 4: PY creates, TS overwrites, both read ===");
await pyWrite2("py-original");
await runtime.writeFile(TEST_PATH_2, "ts-overwrite-1");
await check("PY create → TS overwrite → TS read", tsRead2, "ts-overwrite-1");
await check("PY create → TS overwrite → PY read", pyRead2, "ts-overwrite-1");
log("=== Test 5: PY creates, TS overwrites twice, both read ===");
const TEST_PATH_3 = "/tmp/fs-test-file-3.txt";
const pyWrite3 = async (c: string) => { await runtime.exec("fs-test", ["write", TEST_PATH_3, c]); };
const tsRead3 = async () => runtime.readFile(TEST_PATH_3);
const pyRead3 = async () => {
const r = await runtime.exec("fs-test", ["read", TEST_PATH_3]);
return r.stdout.trim();
};
await pyWrite3("py-first");
await runtime.writeFile(TEST_PATH_3, "ts-second");
await check("PY create → TS overwrite #1 → TS read", tsRead3, "ts-second");
await check("PY create → TS overwrite #1 → PY read", pyRead3, "ts-second");
await runtime.writeFile(TEST_PATH_3, "ts-third");
await check("PY create → TS overwrite #2 → TS read", tsRead3, "ts-third");
await check("PY create → TS overwrite #2 → PY read", pyRead3, "ts-third");
log("=== Test 6: Alternating writers ===");
await tsWrite("ts-v1");
await check("TS write v1 → PY read", pyRead, "ts-v1");
await pyWrite("py-v2");
await check("PY write v2 → TS read", tsRead, "py-v2");
await tsWrite("ts-v3");
await check("TS write v3 → PY read", pyRead, "ts-v3");
await pyWrite("py-v4");
await check("PY write v4 → TS read", tsRead, "py-v4");
await tsWrite("ts-v5");
await check("TS write v5 → PY read", pyRead, "ts-v5");
log(`\n=== Results: ${pass} passed, ${fail} failed ===`);
} catch (e: unknown) {
logStderr(`Test error: ${e instanceof Error ? e.message : e}`);
}
busy = false;
input.disabled = false;
input.focus();
return;
}
// Special built-in: clone
if (trimmed.startsWith("clone ")) {The file /home/david/projects/stirlingbridge/local-orchestrator/src/main.ts has been updated successfully.
> local-orchestrator@0.1.0 build > tsc && vite build vite v6.4.1 building for production... transforming... ✓ 8 modules transformed. rendering chunks... computing gzip size... dist/assets/worker-Ddpt4dpT.js 9.22 kB dist/index.html 11.50 kB │ gzip: 2.44 kB dist/assets/index-Bj65sHiL.js 22.73 kB │ gzip: 7.84 kB ✓ built in 194ms
Build is clean. Type fs-consistency-test after page load. It runs 6 test groups covering all the permutations:
Test 5 specifically targets the pattern you're seeing. If the filesystem is consistent, all tests pass and we know the issue is somewhere in the machine tool's behavior rather than the FS layer.